On 11 Jan 2005 19:09:01 -0800, wrote:

I am PhD student and I doing some work on grounding resistance and I
would like to develop a formula for CALCULATION OF EARTH RESISTANCE IN
MULTI-LAYER EARTH STRUCTURE. and compare it with some field
measurments...What do you think? Is it possible to develop such this
formula?
Just want to remind you again that my case of study (calculation of
Earth resistance for the driven rod in a horizontally stratified
multi-layer earth at non-homogeneous earth).
If any body have any papers to help or any advice please do
I would like to thank you in advance
your Ram

Hi Ram,

Well, you have certainly picked one of the most obscure thesis to
embark upon. Everyone's done it, they all have an answer, but no one
could repeat it anywhere by any rationale except maybe in one fine
publication:
UNITED STATES DEPARTMENT OF AGRICULTURE
Rural Electrification Administration
REA BULLETIN 1751F-802
SUBJECT: Electrical Protection Grounding Fundamentals

It does not characterize soil, but it does a very compelling job of
characterizing technique, which is very valuable.

I don't know what the soil is like there in Malaysia, but you can bet
that it contains all the variables that will make analysis quite a
challenge. I would presume that you at least have less differences in
water content and temperature than here in North America (this drives
a huge difference in earth resistance).

73's
Richard Clark, KB7QHC